Machine for making paper tubes



(No Model.)

M. D. KNOWLTON.

MACHINE FOR MAKING PAPER TUBES'.

No. 850,830. Patented Oct. l2, 1886.

UNITED STATES PATENT EEICE.

unan I). KNowI/ron, on climatic, ILnINoIs.

MACHINE FOR MAKING PAPER TUBES.

SPECIFICATION forming part of Letters Patent N0.`350,830, dated October 1,2, 1886.

A\pplieati0n filed November 27, 1885. Serial No. l8rl,ll0. (X0 model.)

To all whom t may conce-rit:

Be it known that I, MARI; D. KNon'L'roN, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Making Paper Tubes; and l do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the aecoinpanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to acutting device of a tubing-machine, wherein the tube is formed upon a rotating mandrel and is severed by one or more cutters bearing against the tube while the mandrel is in rotation, and has for its object to provide in such cutting mechanism a construction whereby the knife or cutting-disk is pressed against the tube by power derived through the machine.

It also has for its object to prolong the cutting operation through two or more rotations of the mandrel, and to produce by mechanism a gradual entrance of the knife into the substance ol' the tube in the successive rotations of thelatter while being cut.

The invention consists in the several mat ters hereinafter set forth, and pointed out in the appended claims.

In the accompanying drawings, a tubingmachine of the general character illustrated in my application for patent, Serial No. 159,585, iiled March 20, 1885, and allowed October 11885, has been chosen as suited to the application of my present invention, though it is to be understood that this said invention is adapted to be applied to tubing-machines differing from that so shown.

Figure il. is a plan or top view of a tubingmachine. Fig. 2 is a Yfront elevation. Fig. 2i is a vertical transverse section in the line x of Fig. 2. Fig. 4 is a vertical transverse seetion inthe line r/ y, Fig. 9 Fig. 5 is a verti- *Jn cal section in the line ,z' s, Fig. 2. Fig. G is a vertical section in the line yv o of Fig. 5.

A A represent the rigidly-connected parts or frame of the machine.

B is a mandrel upon which the tubes are formed.

C is a driving-pulley, through which rotative motion is applied to the mandrel B in the direction of the arrow shown in Figs. l, 2, 3, and J..

D is a rocking bar, which carries thereon sliding k nifc-holders E, the bar being mounted to rock in the usual manner of this class of machines, wherein its movements have here tofore been produced by hand-power, and the knife-holders also being fitted to said rocking bar and longitudinally movable thereon, in substantially the same way as heretofore constructed.

F is a shaft, which is provided for the especial purpose of operating the rock-bar D,A

and which in this instance is located below the bed of the machine, as being most out of the way and more readily supported inthat position, as by depending arms or brackets A. A, in which it rotates.

Ft is a sproeketwheel on the shaft F, which is rotated by a chain, F, trained over a sprocket, B, on the mandrel-shaft. The wheel F', therefore, has lmotion whenever the mandrel B is rotated; but as it is desirable that the shaft F (as will further appear) shall have motion only during a portion of the time in which the said tubeforming mandrel is oper ated, said shaft F is connected with the wheel F by some suitable form of clutch mechanism which -may be thrown in and out of gear at the will of the operator, and preferably by such a form of clutch mechanism as will give to the shaft F a single rotation, and thereupon automatically stop the same. One forni. of clutch mechanism answering to these last conditions is here shown, but not claimed, as the same is not my invention.

G is an arm on the bracket A2, which arm extends below and to the rear of the bca ring in which the shaft F is mounted in said bracket A.

H is a bar pivoted at its lower end to the arm G,and connected by an adjacent I'od, lll.

with the arm D', fixed to the rock-bar l), said rod H having pivotal connection with both the bar H and the arm D.-

F is a cam iixed on the shaft F adjacent to the arm H, and operating to throw said arm through the medium of a pin, l1, upon which is desirably mounted the anti-friction roller h. lhe rod H is made adjustable by means ol' a screw-threaded part thereof, 712, which ro- 'a OO tates in a tubular portion, h, thereof, the said screw part h2 being fitted to a threaded hole in the head H?, which has a shank that passes through the bar H, and is held in place by the nut h4 on the opposite side of s'aid bar. The object of this construction is to throw the arm H backward by the action of the cam F3 on the pin h, and to thereby tilt the cutterbar forward on its bearings d and to bring the cutter e into pressure upon the mandrel B.

For the purpose of producing a gradual depression of the cutter e into the substance of the tube during a plurality of rotations of the mandrel B, and by not more than a single rotation of the cam F3, the wheel F' is made materially larger than the sprocket B', and the cam F3 is given a slight eccentricity in that portion of its face which produces the throw of the cutter, the said cam F3 being provided with a depression, f, which admits the pin l1I and its friction-roller, if present, far enough toward 'the axis of the shaft F to allow the cutter e to entirely clear the tube in its position at rest, as clearly shown in Fig. 4. The cam F3 has motion in the direction of the arrow applied thereto in said Fig. 4, andA preferably is constructed to throw the cutter e quixkly into bearing upon the tube to be severe AtffZ dotted lines are drawn, indicating, respectively, the radii of the cam at the beginning and at the end of its surface engaging the pin h when the cutter is being forced through the tube.l The radius f is less than the radiusfz, the former being sufficient to carry the cutter e into contact with the tube, and the radius f2 being sufficient to force the cutter deep enough'to sever the tube. A part of the surface of the cam between the radial line f2 and a second radius, f3, drawirnear the notch 7L is preferably made concentric with the shaft F, so as to hold the latter at the forward or inward limit of its throw during one or more rotations of the mandrel.

The operation of the parts above described is plainly as follows: When the shaft F is thrown into engagement with the wheel F', the cutter e will enter the substance of the tube to a gradually-increasing.depth, and the mandrel carrying the tube will make several rotations before the tube is entirely severed,

so that the operation of cutting is gradual,

while automatic, and the saine as it would. be if made by operating the cutter-bar by means of a hand-lever properly manipulated. The adjustment of the throw of the cutter is obviously effected by lengthening or shortening the extensible rod H. It is entirely obvious, however, that other well-known devices may be employed for this adjustment instead of the extensible rod H' shown, or that said rod may be' in many well-known ways made extensible otherwise than as indicated. It is entirely obvious, also, 'that in carrying out the main features of my invention other acting connections between th'e cam and cutter-bar than those above set forth may be used-as, for instance, the said parts may be The particular form of automatic clutch and.

stop illustrated. consists ofthe following:

The device I is a hub fixed to the arms of the wheel F', and having an inwardly-directed flange, l', on the inner edge of which are provided a series of serrations, t.

J is a disk fixed to the shaft F, and having set in the radial recess therein aspring-catch, J', adapted to engage the serrations It' on the hub I. When the catch J' is engaged with the hub I, motion is of Vcourse imparted to the disk J and to the shaft-F. The catch J' projects laterally beyond the hub I, as shown plainly in Figs. 5 and 6, and the advanced face of said catch in that portion thereof which stands out beyond the hub is rounded, as indicated clearly in Fig. 5.

K is a hand-lever pivoted between its ends at 7c to a stationary part ofthe machine, and preferably to a part of the bracket A', as shown. The lever K has lateral motion on its pivot 7c, so that it may be'vibrated into and out of the path of the protruding portion j of the catch J', and is made to stand normally in the said path, and in position to strike the same, by means of a spring, la', Fig. 2, or other suitable means. rI helower end of the leverK is also, as shown, inclined orv rounded out in that portion which engages the end of the catch J', so that when the catch strikes said lower end of the lever K the former is forced inwardly and out of engagement with the serrations@ on the hub I, thus disconnecting the moving hub from the disk J and allowing the latter to come to rest. Said disk J is stopped by the lower end of the lever K, for the reason that the latter is .made long enough to continue to bear on the catch after it has given the latter its inward throw. To obtain the desired effect of a single rotation of the shaft F, therefore, when it is proposed to bring the cutter e into operation on the tube, the upper end of the lever K is thrown tothe left, as the `machine is viewed in Fig. 2, which carries the lower end of said lever out` of engagement with the catch J', and allows the latter to spring into engagement with the rack of hub I. The lever K is then immediately released by the hand, and is thrown back into its upright position by the spring 7c', so that the lower end of said lever stands in the path ofthe catch, which strikes the lever at the end of one revolution of the shaft F, and is disengaged, as described, the said shaft being arrested and held from further rotation bythe IOO continued engagement of the catch J with said lever until the latter is again thrown by hand, as above described.

As before stated, other forms of clutch mechanism may be employed in place of that just described, but the latter is found to be entirely effective and to have the advantage over some others that might be used ot' operating as an automatic stop on the completion of one revolution of the shaft F.

I claim as myinvention-n 1. rlhe combination, with'therotating man d rel of a tube-machineand knife-bar movable toward and from the mandrel, of a shaft having interruptible driviiig-connection with rotating parts which drive the mandrel, and eonnections, substantially as described, between the shaft and Ithe knife-bar, whereby the latter is carried into working position during the rotation ofthe mandrel.

2. The combination, with the mandrel and knife-bar movable toward and from the saidY mandrel, oli' a counter-shaft provided with a cam, actuatingconnections between the cam and knife-bar, ashaft driving the mandrel, and connections between said shaft and the counter-shaft embracing a clutch for givinginterrupted motion to the counter-shaft,substan tially as described.

3. The combination, with the mandrel and knife-bar movable toward and from the said mandrel, of a counter-shaft provided with a cam, adjustable acting connections between the cam and knife-bar, a shaft driving themandrel, and interruptible driving-connections between said shaft and the countershaft, substantially as described.

l. The combination, with a rotating tubeforming mandrel and knife-bar movable toward and from the said mandrel, of a rotating volute cam, interruptible driving mechanisms giving the cam a slower speed than the mandrel, and connections between the cam and knife-bar actuating the latter from the former, substantially as and for thepurposes set forth.

5. The combination, with the mandrel and a knife-bar movable toward and from the said mandrel, and rotating mand rel-d riving shaft, of a counter-shaft carrying a volute cam, a loose wheel on thecounter-shaft driven from thc mandrel-shaft and at slower speed than the mandrel, a clutch connecting the loose wheel with the counter-shaft, a stop constructed to disengage the clutch and stop the shaft atthe termination of one revolution thereof, and connections between the cam and knife-bar actuating the latter from the former, substantially as and for the purposes set forth.

In testimony that I claim the, foregoing as my invention I affix my signature in presence of two witnesses.

MARK D. KNOlVl/FON.

lVitness'es:

C. GLnRnNon Poom), \V. N. .l1n.r.vir.\:\". 

